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terminal: add term_linefeed() and term_reverse_index()

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linefeed moves cursor down one row (columns stays the same), or, if
the cursor is at the last row, scrolls up one row.

reverse_index does the opposite; it moves the cursor *up* one row, or,
if the cursor is at the top row, scrolls *down* one row.
This commit is contained in:
Daniel Eklöf 2019-07-10 16:02:03 +02:00
parent 96bd55f7c4
commit 3ab68c575b
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GPG key ID: 5BBD4992C116573F
2 changed files with 21 additions and 0 deletions
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18
terminal.c
View file

@ -219,6 +219,24 @@ term_scroll_reverse(struct terminal *term, int rows)
term_scroll_reverse_partial(term, term->scroll_region, rows); term_scroll_reverse_partial(term, term->scroll_region, rows);
} }
void
term_linefeed(struct terminal *term)
{
if (term->cursor.row == term->scroll_region.end - 1)
term_scroll(term, 1);
else
term_cursor_down(term, 1);
}
void
term_reverse_index(struct terminal *term)
{
if (term->cursor.row == term->scroll_region.start)
term_scroll_reverse(term, 1);
else
term_cursor_up(term, 1);
}
static int static int
linux_mouse_button_to_x(int button) linux_mouse_button_to_x(int button)
{ {

3
terminal.h
View file

@ -269,6 +269,9 @@ void term_scroll_partial(
void term_scroll_reverse_partial( void term_scroll_reverse_partial(
struct terminal *term, struct scroll_region region, int rows); struct terminal *term, struct scroll_region region, int rows);
void term_linefeed(struct terminal *term);
void term_reverse_index(struct terminal *term);
void term_mouse_down(struct terminal *term, int button, int row, int col, void term_mouse_down(struct terminal *term, int button, int row, int col,
bool shift, bool alt, bool ctrl); bool shift, bool alt, bool ctrl);
void term_mouse_up(struct terminal *term, int button, int row, int col, void term_mouse_up(struct terminal *term, int button, int row, int col,